Looking for Hexagonal bricks.

[Shroom]

I'm looking for these kinds of bricks:

(The Floor)

But, I can't find them anywhere. I remember playing on a server with someone that had bricks like these. I really need them.
Anyone know where I can find these?

Thanks.

Edit: Preferrably about 16x16 or 8x8 size.

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[Blockhead31735]

Hexagon Bricks
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[Shroom]

Sorry, thanks. Locking.